A method of supplying power in a wireless power receiver can include receiving an AC power via a reception coil in the wireless power receiver; rectifying the AC power to a DC power; entering a charging mode by transferring the DC power to a load when a voltage of the DC power is equal to or greater than a first threshold voltage; and maintaining the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode, in which the first threshold voltage is greater than the second threshold voltage.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of supplying power in a wireless power receiver, the method comprising: receiving an AC power via a reception coil in the wireless power receiver; rectifying the AC power to a DC power; entering a charging mode by transferring the DC power to a load when a voltage of the DC power is equal to or greater than a first threshold voltage; and maintaining the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode, wherein the first threshold voltage is greater than the second threshold voltage.
2. The method of claim 1 , comprising: blocking the DC power to the load when the voltage of the DC power is less than the second threshold voltage.
3. The method of claim 1 , comprising: measuring the voltage of the DC power.
4. The method of claim 3 , comprising: blocking the DC power to the load when the voltage of the DC power transitions from a voltage higher than the second threshold voltage to a lower voltage less than the second threshold voltage.
5. The method of claim 1 , wherein the first threshold voltage is a minimum voltage required for the load to enter the charging mode.
6. The method of claim 1 , wherein the second threshold voltage is a minimum voltage required for the load to maintain the charging mode.
7. The method of claim 1 , wherein the first threshold is at least 4.2V.
8. A wireless power receiver comprising: a reception coil configured to output an AC power; a rectifier configured to rectify the AC power to a DC power; and a controller configured to: enter a charging mode by transferring the DC power to a load when a voltage of the DC power is equal to or greater than a first threshold voltage, and maintain the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode, wherein the first threshold voltage is greater than the second threshold voltage.
9. The wireless power receiver of claim 8 , wherein the controller is further configured to: block the DC power to the load when the voltage of the DC power is less than the second threshold voltage.
10. The wireless power receiver of claim 8 , wherein the controller is further configured to: block the DC power to the load when the voltage of the DC power transitions from a voltage higher than the second threshold voltage to a lower voltage less than the second threshold voltage.
11. The wireless power receiver of claim 8 , wherein the controller is further configured to: measure the voltage of the DC power.
12. The wireless power receiver of claim 8 , wherein the first threshold voltage is a minimum voltage required for the load to enter the charging mode.
13. The wireless power receiver of claim 8 , wherein the second threshold voltage is a minimum voltage required for the load to maintain the charging mode.
14. The wireless power receiver of claim 8 , wherein the first threshold is at least 4.2V.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 4, 2019
June 30, 2020
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